print("hello")
print("hello","world",false,nil)

print("换行","\na\nb\nc")
print("制表","a\tb\tc\t")

str=[[\na\nb\nca\tb\tc\t]]
print("str",str)

print("str长度",#str)

io.write("hello","world")
io.write("hello","world")
io.write("hello","world")
